The DcaXY splitting issue for different charged tracks has been found in DEV for a long time, it still exists in DEV earlier than Nov 11th 2014.

The data production for 14.5 GeV has been asked by many people, we have to understand the potential uncertainty from this issue. From LFS, we have asked people from 3 most related analysis, spectra, strangeness, and di-electron, to study the uncertainty caused by dcaXY splitting.
Here are the studies done by Stephen, Xianglei and Joey:
1. Spectra by Stephen.
http://www.star.bnl.gov/protected/jetcorr/horvat/dca14GeVStudy/dcashift14.pdf
The conclusion is that effect on spectra is ~ 0.5 % which is negligible.

2. Strangeness by Xianglei.
Xianglei did a quite detailed study for strangeness particles, in particular for Lambda. The Lambda decayed pions are soft, which is shown in
http://www.star.bnl.gov/protected/lfspectra/zhux/bes/15/dau2pt.pdf

The dca between daughter proton and pion is shown in
http://www.star.bnl.gov/protected/lfspectra/zhux/bes/15/dca1to2.pdf
It is important to understand the uncertainty from dca shift if we can't reproduce the dca shift in embedding.
Xianglei set pT +/- 3 MeV/c to mimic the dca shift for pions, which is close to what we observed in first plot.
http://www.star.bnl.gov/protected/lfspectra/zhux/bes/15/mean_dcaxy_shift.gif
Then the resulting Lambda efficiency will be like:

The uncertainty will be ~8% at the lowest pT bin (0.2-0.4) for Lambda, also the shape of the spectra could be changed at low pT (<1GeV/c).
In addition, the effect of pT+/- 5MeV/c also be studied, which is shown in:
http://www.star.bnl.gov/protected/lfspectra/zhux/bes/15/auau7_la_eff_comp_cut0_5add.pdf
significant larger.

3. Dielectron by Joey. 
http://www.bonner.rice.edu/~jb31/protected/27GeVDiElectron/Presentations/November212014/Nov212012_dielectron.pdf
In conclusion, the efficiency has an uncertainty ~5% from dca shift for low pT bins. Here is the ratio between efficiency before and after dca shift, studied in 27 GeV electron embedding sample.
http://www.bonner.rice.edu/~jb31/protected/27GeVDiElectron/Presentations/November212014/RealisticShift/ratiooverall.pdf

From these 3 studies, we conclude that the effect of dca shift is most significant at low pT, but it is less than 8% for Lambda which is one of the most impacted particles.